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REVENUES (Contract Balances) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Revenue recognized | $ 439 | $ 140 | $ 8,301 | $ 3,801 |
Revenues from performance obligations satisfied in previous period | 9,105 | $ 4,915 | 4,719 | $ 7,039 |
Trade receivables and contract assets |  |  |  |  |
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Contract assets | 21,548 |  | 21,548 |  | $ 14,320
Accrued expenses and other current liabilities |  |  |  |  |
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Contract liabilties | $ 12,415 |  | $ 12,415 |  | $ 9,132

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- Definition Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer, when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
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